Heat is the deadliest weather-related hazard in the United States. This paper studies municipal heat adaptation using survey and planning data from California. We first analyze the characteristics of municipalities that innovate. Cities with heat-related policies have greater degrees of projected extreme heat, leadership support, environmental justice planning, and smaller Hispanic population shares. We then assess specific policy innovations of six large cities by plan type. Some strategies, including expanding tree canopies, have been widely adopted while others, such as cool walls, are rarely included. Findings suggest that planners can—and should—play a central role in heat adaptation planning.
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